Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a4e633acfd51e05…

MALICIOUS

PDF

82.2 KB Created: 2021-04-11 03:05:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 82ae17255cb95427723fb03a9177b270 SHA-1: 22c39f01c12c697fd9c1a0685dab991b1451bd95 SHA-256: 8a4e633acfd51e059e370864cf64bdddd7eed4e0852b012acdb499813c30e348
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and numerous external links point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dugedepap.ru/strik?utm_term=midi+to+cv+gate+cable PDF link annotation
    • https://cdn.sqhk.co/mafulavet/6uheiaQ/tefefodulida.pdfIn PDF document text
    • https://cdn.sqhk.co/lididiregi/hajaOhe/42826877782.pdfIn PDF document text
    • https://cdn.sqhk.co/gajerivab/zZNzPjc/lewowemeluwenuwamerawaw.pdfIn PDF document text
    • http://deflecfcvy.best/10932787147yzmp4.pdfIn PDF document text
    • http://miraluvofizobe.medianewsonline.com/ccna_1_notes.pdfIn PDF document text
    • http://jobauthor.online/36351181729siewl.pdfIn PDF document text
    • http://ripugusulufiluj.getenjoyment.net/kuwuj.pdfIn PDF document text
    • http://wiboratiraveguw.mygamesonline.org/98399559418.pdfIn PDF document text
    • http://zokoxakabu.medianewsonline.com/english_for_international_banking_and_finance.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/jelaj.pdfIn PDF document text
    • https://cdn.sqhk.co/wujukipako/gh0ghhg/world_empire_2027_mod_apk_free_tokens.pdfIn PDF document text
    • https://cdn.sqhk.co/nevupediwix/haShgnv/cat_runny_poop_with_blood.pdfIn PDF document text
    • http://fb-ig-copyright.com/office_manager_job_summary_resumejv4kt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://49b7c339-fea6-4bb3-bf7b-ca47af5263df.filesusr.com/ugd/6ca12d_0231587a83624e1c9df9c0ae2fb6a552.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a17f4c8-8d09-4b54-905d-420c4ad063df/manual_compacto_de_gramatica_da_lingua_inglesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15e171b2-69ab-4c9d-b7a6-e4db3eebc55c/how_do_i_set_up_my_total_gym_xls.pdfIn PDF document text
    • https://37991ae0-d72b-4ccf-bf90-288dedd591e7.filesusr.com/ugd/041b56_2b480cc0f8ac42779af05ca0b2babba6.pdf?index=trueIn PDF document text
    • http://namepafubi.atwebpages.com/41574841029.pdfIn PDF document text
    • http://bebovufuvuji.myartsonline.com/wanovazukitibolaz.pdfIn PDF document text
    • http://gafodix.myartsonline.com/82468030839.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E7 5036 bytes
SHA-256: c43147f9dc593b36ff1e9980b6e155bd3f612abb37034879fbb3c78967454690
font_01_sfnt_off0001152f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1152F 11852 bytes
SHA-256: 471720e11f7e30b5401605db8391099e9ad83c0a67ba9ab78bf59eeb714180d3

Open this report in the interactive analyzer, or submit your own file for analysis.